A dwarf elliptical galaxy in this constellation is the second-nearest to the Milky Way. An H II region in this constellation consists of both an open cluster, an emission nebula, a reflection nebula, and a dark nebula; that region is the Trifid Nebula, which along with NGC 6559 and the (*) Lagoon Nebula makes this constellation's namesake "triplet." One feature in this constellation is a radio source at the center of the galaxy, possibly a supermassive black hole; that feature is near its border with Scorpius. For 10 points, name this constellation representing an archer.
A dwarf elliptical galaxy in this constellation is the second-nearest to the Milky Way. An H II region in this constellation consists of both an open cluster, an emission nebula, a reflection nebula, and a dark nebula; that region is the Trifid Nebula, which along with NGC 6559 and the (*) Lagoon Nebula makes this constellation's namesake "triplet." One feature in this constellation is a radio source at the center of the galaxy, possibly a supermassive black hole; that feature is near its border with Scorpius. For 10 points, name this constellation representing an archer.
A dwarf elliptical galaxy in this constellation is the second-nearest to the Milky Way.
{Sagittarius}